EP0678502B1 - Verfahren zur Herstellung von Glykoloylaniliden - Google Patents
Verfahren zur Herstellung von Glykoloylaniliden Download PDFInfo
- Publication number
- EP0678502B1 EP0678502B1 EP95105178A EP95105178A EP0678502B1 EP 0678502 B1 EP0678502 B1 EP 0678502B1 EP 95105178 A EP95105178 A EP 95105178A EP 95105178 A EP95105178 A EP 95105178A EP 0678502 B1 EP0678502 B1 EP 0678502B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- formula
- compound
- reacted
- chloride
- catalyst
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title description 15
- 238000000034 method Methods 0.000 claims description 70
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 69
- 239000003054 catalyst Substances 0.000 claims description 68
- 150000001875 compounds Chemical class 0.000 claims description 62
- 238000006243 chemical reaction Methods 0.000 claims description 60
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 claims description 51
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 claims description 34
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 33
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 32
- 239000002585 base Substances 0.000 claims description 28
- 229910000510 noble metal Inorganic materials 0.000 claims description 26
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 24
- 125000000217 alkyl group Chemical group 0.000 claims description 24
- -1 cyano, carboxyl Chemical group 0.000 claims description 24
- 239000002904 solvent Substances 0.000 claims description 24
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 22
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims description 22
- 229910052739 hydrogen Inorganic materials 0.000 claims description 20
- 239000001257 hydrogen Substances 0.000 claims description 20
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 19
- 239000011541 reaction mixture Substances 0.000 claims description 19
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 18
- 235000019445 benzyl alcohol Nutrition 0.000 claims description 17
- 125000004432 carbon atom Chemical group C* 0.000 claims description 17
- 229910052736 halogen Inorganic materials 0.000 claims description 17
- 229910052697 platinum Inorganic materials 0.000 claims description 17
- 150000002367 halogens Chemical class 0.000 claims description 16
- 229910052763 palladium Inorganic materials 0.000 claims description 15
- VGCXGMAHQTYDJK-UHFFFAOYSA-N Chloroacetyl chloride Chemical compound ClCC(Cl)=O VGCXGMAHQTYDJK-UHFFFAOYSA-N 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 13
- 150000003839 salts Chemical class 0.000 claims description 13
- 238000002360 preparation method Methods 0.000 claims description 12
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims description 11
- 238000009835 boiling Methods 0.000 claims description 10
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 9
- 150000001728 carbonyl compounds Chemical class 0.000 claims description 9
- 239000000460 chlorine Substances 0.000 claims description 9
- 229910052801 chlorine Inorganic materials 0.000 claims description 9
- 125000003545 alkoxy group Chemical group 0.000 claims description 8
- 150000008044 alkali metal hydroxides Chemical class 0.000 claims description 6
- 125000003917 carbamoyl group Chemical group [H]N([H])C(*)=O 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 5
- 239000008096 xylene Substances 0.000 claims description 5
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 4
- 125000004183 alkoxy alkyl group Chemical group 0.000 claims description 4
- 125000004397 aminosulfonyl group Chemical group NS(=O)(=O)* 0.000 claims description 4
- 239000011737 fluorine Substances 0.000 claims description 4
- 229910052731 fluorine Inorganic materials 0.000 claims description 4
- 125000002768 hydroxyalkyl group Chemical group 0.000 claims description 4
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 claims description 4
- 229910000288 alkali metal carbonate Inorganic materials 0.000 claims description 3
- 150000008041 alkali metal carbonates Chemical class 0.000 claims description 3
- 150000003738 xylenes Chemical class 0.000 claims description 3
- 125000005041 acyloxyalkyl group Chemical group 0.000 claims 2
- 125000004453 alkoxycarbonyl group Chemical group 0.000 claims 2
- 125000004093 cyano group Chemical group *C#N 0.000 claims 2
- 150000002431 hydrogen Chemical class 0.000 claims 2
- 239000003610 charcoal Substances 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 239000000047 product Substances 0.000 description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000005481 NMR spectroscopy Methods 0.000 description 8
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 7
- VPYJBEIOKFRWQZ-UHFFFAOYSA-N benzyl 2-hydroxyacetate Chemical compound OCC(=O)OCC1=CC=CC=C1 VPYJBEIOKFRWQZ-UHFFFAOYSA-N 0.000 description 7
- 150000005181 nitrobenzenes Chemical class 0.000 description 7
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 6
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000001914 filtration Methods 0.000 description 6
- 239000010970 precious metal Substances 0.000 description 6
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- WFQDTOYDVUWQMS-UHFFFAOYSA-N 1-fluoro-4-nitrobenzene Chemical class [O-][N+](=O)C1=CC=C(F)C=C1 WFQDTOYDVUWQMS-UHFFFAOYSA-N 0.000 description 4
- BKSIERMKNBPHJD-UHFFFAOYSA-N 2-chloro-n-(4-fluorophenyl)-n-propan-2-ylacetamide Chemical compound ClCC(=O)N(C(C)C)C1=CC=C(F)C=C1 BKSIERMKNBPHJD-UHFFFAOYSA-N 0.000 description 4
- VONWPEXRCLHKRJ-UHFFFAOYSA-N 2-chloro-n-phenylacetamide Chemical compound ClCC(=O)NC1=CC=CC=C1 VONWPEXRCLHKRJ-UHFFFAOYSA-N 0.000 description 4
- TZGPACAKMCUCKX-UHFFFAOYSA-N 2-hydroxyacetamide Chemical class NC(=O)CO TZGPACAKMCUCKX-UHFFFAOYSA-N 0.000 description 4
- RMXBOQCXULAXBO-UHFFFAOYSA-N 4-fluoro-n-propan-2-ylaniline Chemical compound CC(C)NC1=CC=C(F)C=C1 RMXBOQCXULAXBO-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 239000000706 filtrate Substances 0.000 description 4
- 239000000543 intermediate Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- AZUYLZMQTIKGSC-UHFFFAOYSA-N 1-[6-[4-(5-chloro-6-methyl-1H-indazol-4-yl)-5-methyl-3-(1-methylindazol-5-yl)pyrazol-1-yl]-2-azaspiro[3.3]heptan-2-yl]prop-2-en-1-one Chemical compound ClC=1C(=C2C=NNC2=CC=1C)C=1C(=NN(C=1C)C1CC2(CN(C2)C(C=C)=O)C1)C=1C=C2C=NN(C2=CC=1)C AZUYLZMQTIKGSC-UHFFFAOYSA-N 0.000 description 3
- NDZJSUCUYPZXPR-UHFFFAOYSA-N 1-nitro-2-(trifluoromethyl)benzene Chemical class [O-][N+](=O)C1=CC=CC=C1C(F)(F)F NDZJSUCUYPZXPR-UHFFFAOYSA-N 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- 0 Cc1c(C)c(*)c(*)c(*)c1* Chemical compound Cc1c(C)c(*)c(*)c(*)c1* 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 229910001854 alkali hydroxide Inorganic materials 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 3
- 238000006264 debenzylation reaction Methods 0.000 description 3
- 238000004821 distillation Methods 0.000 description 3
- 239000013067 intermediate product Substances 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 3
- 150000003254 radicals Chemical class 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 238000007127 saponification reaction Methods 0.000 description 3
- 239000001632 sodium acetate Substances 0.000 description 3
- 235000017281 sodium acetate Nutrition 0.000 description 3
- 238000005292 vacuum distillation Methods 0.000 description 3
- MKARNSWMMBGSHX-UHFFFAOYSA-N 3,5-dimethylaniline Chemical compound CC1=CC(C)=CC(N)=C1 MKARNSWMMBGSHX-UHFFFAOYSA-N 0.000 description 2
- KFIRODWJCYBBHY-UHFFFAOYSA-N 3-nitrophthalic acid Chemical class OC(=O)C1=CC=CC([N+]([O-])=O)=C1C(O)=O KFIRODWJCYBBHY-UHFFFAOYSA-N 0.000 description 2
- KRZCOLNOCZKSDF-UHFFFAOYSA-N 4-fluoroaniline Chemical compound NC1=CC=C(F)C=C1 KRZCOLNOCZKSDF-UHFFFAOYSA-N 0.000 description 2
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 2
- AFBPFSWMIHJQDM-UHFFFAOYSA-N N-methylaniline Chemical compound CNC1=CC=CC=C1 AFBPFSWMIHJQDM-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- NBBJYMSMWIIQGU-UHFFFAOYSA-N Propionic aldehyde Chemical compound CCC=O NBBJYMSMWIIQGU-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 150000001242 acetic acid derivatives Chemical class 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000010933 acylation Effects 0.000 description 2
- 238000005917 acylation reaction Methods 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 125000005907 alkyl ester group Chemical group 0.000 description 2
- 229940040526 anhydrous sodium acetate Drugs 0.000 description 2
- 238000005574 benzylation reaction Methods 0.000 description 2
- 125000000051 benzyloxy group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])O* 0.000 description 2
- 239000003139 biocide Substances 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 238000005660 chlorination reaction Methods 0.000 description 2
- 150000001805 chlorine compounds Chemical class 0.000 description 2
- 238000003776 cleavage reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 150000002170 ethers Chemical class 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- GQKZBCPTCWJTAS-UHFFFAOYSA-N methoxymethylbenzene Chemical class COCC1=CC=CC=C1 GQKZBCPTCWJTAS-UHFFFAOYSA-N 0.000 description 2
- UKJAXSNNUOIELA-UHFFFAOYSA-N n-(4-fluorophenyl)-2-phenylmethoxy-n-propan-2-ylacetamide Chemical compound C=1C=C(F)C=CC=1N(C(C)C)C(=O)COCC1=CC=CC=C1 UKJAXSNNUOIELA-UHFFFAOYSA-N 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 235000019198 oils Nutrition 0.000 description 2
- 238000005580 one pot reaction Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- XHXFXVLFKHQFAL-UHFFFAOYSA-N phosphoryl trichloride Chemical compound ClP(Cl)(Cl)=O XHXFXVLFKHQFAL-UHFFFAOYSA-N 0.000 description 2
- 230000007017 scission Effects 0.000 description 2
- 150000003335 secondary amines Chemical class 0.000 description 2
- FDRCDNZGSXJAFP-UHFFFAOYSA-M sodium chloroacetate Chemical compound [Na+].[O-]C(=O)CCl FDRCDNZGSXJAFP-UHFFFAOYSA-M 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 239000012265 solid product Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- FYSNRJHAOHDILO-UHFFFAOYSA-N thionyl chloride Chemical compound ClS(Cl)=O FYSNRJHAOHDILO-UHFFFAOYSA-N 0.000 description 2
- 238000010626 work up procedure Methods 0.000 description 2
- VTOOAIHVOXXCFP-UHFFFAOYSA-N (2-anilino-2-oxoethyl) acetate Chemical class CC(=O)OCC(=O)NC1=CC=CC=C1 VTOOAIHVOXXCFP-UHFFFAOYSA-N 0.000 description 1
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 description 1
- CTMUNKNATYSNFO-UHFFFAOYSA-N 1,2,3-trimethoxy-4-nitrobenzene Chemical class COC1=CC=C([N+]([O-])=O)C(OC)=C1OC CTMUNKNATYSNFO-UHFFFAOYSA-N 0.000 description 1
- HBPWZZBSVWZXTN-UHFFFAOYSA-N 1,2,3-trimethyl-4-nitrobenzene Chemical class CC1=CC=C([N+]([O-])=O)C(C)=C1C HBPWZZBSVWZXTN-UHFFFAOYSA-N 0.000 description 1
- DWVNLBRNGAANPI-UHFFFAOYSA-N 1,2-dimethoxy-3-nitrobenzene Chemical class COC1=CC=CC([N+]([O-])=O)=C1OC DWVNLBRNGAANPI-UHFFFAOYSA-N 0.000 description 1
- FVHAWXWFPBPFOS-UHFFFAOYSA-N 1,2-dimethyl-3-nitrobenzene Chemical class CC1=CC=CC([N+]([O-])=O)=C1C FVHAWXWFPBPFOS-UHFFFAOYSA-N 0.000 description 1
- XGLGESCVNJSAQY-UHFFFAOYSA-N 1-ethoxy-2-nitrobenzene Chemical class CCOC1=CC=CC=C1[N+]([O-])=O XGLGESCVNJSAQY-UHFFFAOYSA-N 0.000 description 1
- XKYLCLMYQDFGKO-UHFFFAOYSA-N 1-nitro-4-(trifluoromethyl)benzene Chemical compound [O-][N+](=O)C1=CC=C(C(F)(F)F)C=C1 XKYLCLMYQDFGKO-UHFFFAOYSA-N 0.000 description 1
- 238000001644 13C nuclear magnetic resonance spectroscopy Methods 0.000 description 1
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 description 1
- NVCRRGSPYQZMCB-UHFFFAOYSA-N 2-hydroxy-3-phenylpropanoyl chloride Chemical compound ClC(=O)C(O)CC1=CC=CC=C1 NVCRRGSPYQZMCB-UHFFFAOYSA-N 0.000 description 1
- YSEFYOVWKJXNCH-UHFFFAOYSA-N 2-methoxyacetaldehyde Chemical compound COCC=O YSEFYOVWKJXNCH-UHFFFAOYSA-N 0.000 description 1
- CFBYEGUGFPZCNF-UHFFFAOYSA-N 2-nitroanisole Chemical class COC1=CC=CC=C1[N+]([O-])=O CFBYEGUGFPZCNF-UHFFFAOYSA-N 0.000 description 1
- KLGQWSOYKYFBTR-UHFFFAOYSA-N 2-nitrobenzamide Chemical class NC(=O)C1=CC=CC=C1[N+]([O-])=O KLGQWSOYKYFBTR-UHFFFAOYSA-N 0.000 description 1
- GNDKYAWHEKZHPJ-UHFFFAOYSA-N 2-nitrobenzenesulfonimidic acid Chemical class NS(=O)(=O)C1=CC=CC=C1[N+]([O-])=O GNDKYAWHEKZHPJ-UHFFFAOYSA-N 0.000 description 1
- SLAMLWHELXOEJZ-UHFFFAOYSA-N 2-nitrobenzoic acid Chemical class OC(=O)C1=CC=CC=C1[N+]([O-])=O SLAMLWHELXOEJZ-UHFFFAOYSA-N 0.000 description 1
- XAWCLWKTUKMCMO-UHFFFAOYSA-N 2-nitroethylbenzene Chemical class [O-][N+](=O)CCC1=CC=CC=C1 XAWCLWKTUKMCMO-UHFFFAOYSA-N 0.000 description 1
- CAHWDGJDQYAFHM-UHFFFAOYSA-N 2-nitroisophthalic acid Chemical class OC(=O)C1=CC=CC(C(O)=O)=C1[N+]([O-])=O CAHWDGJDQYAFHM-UHFFFAOYSA-N 0.000 description 1
- GUPGZURVZDIQPM-UHFFFAOYSA-N 2-oxoethyl acetate Chemical compound CC(=O)OCC=O GUPGZURVZDIQPM-UHFFFAOYSA-N 0.000 description 1
- BDXFKMQTIGVLEU-UHFFFAOYSA-N 3-carbamoyl-5-nitrobenzoic acid Chemical class NC(=O)C1=CC(C(O)=O)=CC([N+]([O-])=O)=C1 BDXFKMQTIGVLEU-UHFFFAOYSA-N 0.000 description 1
- GMOAOEGBMSRFFQ-UHFFFAOYSA-N 3-nitrobenzene-1,2-dicarboxamide Chemical class NC(=O)C1=CC=CC([N+]([O-])=O)=C1C(N)=O GMOAOEGBMSRFFQ-UHFFFAOYSA-N 0.000 description 1
- CZGCEKJOLUNIFY-UHFFFAOYSA-N 4-Chloronitrobenzene Chemical compound [O-][N+](=O)C1=CC=C(Cl)C=C1 CZGCEKJOLUNIFY-UHFFFAOYSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 238000000023 Kugelrohr distillation Methods 0.000 description 1
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical class CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 1
- 235000019502 Orange oil Nutrition 0.000 description 1
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical class [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 1
- 241000394605 Viola striata Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 230000021736 acetylation Effects 0.000 description 1
- 238000006640 acetylation reaction Methods 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 150000004982 aromatic amines Chemical class 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N butyric aldehyde Natural products CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- FOCAUTSVDIKZOP-UHFFFAOYSA-N chloroacetic acid Chemical compound OC(=O)CCl FOCAUTSVDIKZOP-UHFFFAOYSA-N 0.000 description 1
- 229940106681 chloroacetic acid Drugs 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000020176 deacylation Effects 0.000 description 1
- 238000005947 deacylation reaction Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 150000002168 ethanoic acid esters Chemical class 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000000417 fungicide Substances 0.000 description 1
- 229960004275 glycolic acid Drugs 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004009 herbicide Substances 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 238000007327 hydrogenolysis reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- NQSNUASUVYPYRS-UHFFFAOYSA-N n-(4-fluorophenyl)-2-hydroxy-n-propan-2-ylacetamide Chemical compound OCC(=O)N(C(C)C)C1=CC=C(F)C=C1.OCC(=O)N(C(C)C)C1=CC=C(F)C=C1 NQSNUASUVYPYRS-UHFFFAOYSA-N 0.000 description 1
- RISGISSUGUGJMO-UHFFFAOYSA-N n-(4-fluorophenyl)-2-hydroxy-n-propan-2-ylacetamide Chemical compound OCC(=O)N(C(C)C)C1=CC=C(F)C=C1 RISGISSUGUGJMO-UHFFFAOYSA-N 0.000 description 1
- 150000005338 nitrobenzoic acids Chemical class 0.000 description 1
- VLZLOWPYUQHHCG-UHFFFAOYSA-N nitromethylbenzene Chemical class [O-][N+](=O)CC1=CC=CC=C1 VLZLOWPYUQHHCG-UHFFFAOYSA-N 0.000 description 1
- QUMITRDILMWWBC-UHFFFAOYSA-N nitroterephthalic acid Chemical class OC(=O)C1=CC=C(C(O)=O)C([N+]([O-])=O)=C1 QUMITRDILMWWBC-UHFFFAOYSA-N 0.000 description 1
- VMPITZXILSNTON-UHFFFAOYSA-N o-anisidine Chemical compound COC1=CC=CC=C1N VMPITZXILSNTON-UHFFFAOYSA-N 0.000 description 1
- 239000010502 orange oil Substances 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- BHAAPTBBJKJZER-UHFFFAOYSA-N p-anisidine Chemical compound COC1=CC=C(N)C=C1 BHAAPTBBJKJZER-UHFFFAOYSA-N 0.000 description 1
- UHZYTMXLRWXGPK-UHFFFAOYSA-N phosphorus pentachloride Chemical compound ClP(Cl)(Cl)(Cl)Cl UHZYTMXLRWXGPK-UHFFFAOYSA-N 0.000 description 1
- 150000003141 primary amines Chemical class 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical class CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 239000008262 pumice Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 150000005199 trimethylbenzenes Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/24—Preparation of compounds containing amino groups bound to a carbon skeleton by reductive alkylation of ammonia, amines or compounds having groups reducible to amino groups, with carbonyl compounds
- C07C209/26—Preparation of compounds containing amino groups bound to a carbon skeleton by reductive alkylation of ammonia, amines or compounds having groups reducible to amino groups, with carbonyl compounds by reduction with hydrogen
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/30—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds
- C07C209/32—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups
- C07C209/36—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups by reduction of nitro groups bound to carbon atoms of six-membered aromatic rings in presence of hydrogen-containing gases and a catalyst
- C07C209/365—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups by reduction of nitro groups bound to carbon atoms of six-membered aromatic rings in presence of hydrogen-containing gases and a catalyst by reduction with preservation of halogen-atoms in compounds containing nitro groups and halogen atoms bound to the same carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C231/00—Preparation of carboxylic acid amides
- C07C231/02—Preparation of carboxylic acid amides from carboxylic acids or from esters, anhydrides, or halides thereof by reaction with ammonia or amines
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C231/00—Preparation of carboxylic acid amides
- C07C231/12—Preparation of carboxylic acid amides by reactions not involving the formation of carboxamide groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C235/00—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms
- C07C235/02—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to acyclic carbon atoms and singly-bound oxygen atoms bound to the same carbon skeleton
- C07C235/04—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to acyclic carbon atoms and singly-bound oxygen atoms bound to the same carbon skeleton the carbon skeleton being acyclic and saturated
- C07C235/16—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to acyclic carbon atoms and singly-bound oxygen atoms bound to the same carbon skeleton the carbon skeleton being acyclic and saturated having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a six-membered aromatic ring
Definitions
- the present invention relates to processes for the production of Glycoloylaniliden (Hydroxyacetaniliden) as well as new O-Benzylglykoloylanilide and Process for their production.
- Glycoloylanilides are important primary products for the production of herbicides (EP-A 300 344 and EP-A 510 479), active pharmaceutical ingredients (DE-A 083 964 and EP-A 284 388) and fungicides (US 4,440,780).
- a chloroacetanilide is saponified with aqueous Alkali hydroxide in the presence of a solvent (dimethoxyethane).
- a solvent diimethoxyethane
- To this Saponification is followed by a very complex, multi-stage workup, which i.a. three filtration, two extraction and two drying steps and that Passing gaseous HCl comprises.
- the corresponding glycoloylanilide is obtained with a yield of 78.1%, an indication of the purity of the product is missing.
- DE-OS 32 22 229 describes a process for the production of mono- and disubstituted glycoloylamides (glycolic acid amides), taking a mixture from sodium chloroacetate, a tertiary amine as catalyst and xylene as Diluent heated to boiling, the solid formed Intermediate isolated and this not disclosed in the structure Solid product, which is believed to be a mixture of oligoglycolides a primary or secondary amine in the presence of a quaternary Ammonium salt as a catalyst to the corresponding glycoloylamides implements.
- glycoloylamides glycoloylamides
- a disadvantage of the process is that the oligoglycolide mixture is a solid product must be isolated by filtration and that it as a chlorine-containing product in the next process stage is used.
- the use turns out to be of quaternary ammonium salts as a catalyst because of their biocides Characteristics as problematic.
- the yield is for one Production of glycoloylanilides unsatisfactory.
- DE-OS 29 04 490 relates to a process for the production of Glycoloylamides ( ⁇ -hydroxycarboxamides) by reacting ⁇ -halocarboxamides with alkali or alkaline earth acetates to the corresponding ⁇ -acetoxycarboxamides and subsequent cleavage (Deacylation) of the ⁇ -acetoxycarboxamides.
- ⁇ -halocarboxamides used require their own Production and can be done, for example, by reacting ⁇ -halocarboxylic acid halides with ammonia or primary or secondary Amines, optionally in the presence of an acid acceptor (potassium hydroxide) produce.
- ⁇ -halocarboxamides as Feedstock is the method of DE-OS 29 04 490 a two-stage process, wherein the ⁇ -acetoxycarboxamide formed in the first process stage be isolated with removal of the solvent must then in the second stage of the process using a aliphatic alcohol as a solvent in the presence of catalytic amounts of an alkali or alkaline earth hydroxide to be solvolytically cleaved.
- the disadvantage of the method is the use of ⁇ -halocarboxamides, which are manufactured separately Require labor as input and on the other hand the use of at least two different solvents, the isolation of the ⁇ -acetoxycarboxamides and the use of quaternary Ammonium salts as catalysts.
- the result of the second stage ongoing reaction in acetic acid esters formed in stoichiometric amounts requires quaternary as well as the biocide used as catalyst Ammonium salt both in the processing and in the disposal Additional procedural steps that require an increased outlay on equipment require.
- An advantage of the method according to the invention is that it is because of the large number of possible nitrobenzenes as a starting material general formula (A) can be used in a wide range and to a variety corresponding Glycoloylanilide leads. This means that the Procedure guaranteed.
- Another advantage of the method according to the invention is that it does not is required every single one formed in the course of the synthesis Isolate and purify intermediate to clean it afterwards Form to process further. Rather, it is possible, depending on your wishes or needs, on one or more of these separation steps and related to it subsequent cleaning of the respective intermediate product to be omitted. This has the consequence that the inventive method in the corresponding Reaction steps are technically particularly simple and can be done without major Lets carry out effort.
- the method according to the invention can be started from the corresponding nitrobenzene of formula (A), using a perform only solvent in the sense of a one-pot process, wherein all reaction stages without isolation and cleaning of the respective Intermediates are run through to Glycoloylanilide.
- This Process variant provides a particularly advantageous and technically easy Realizing embodiment of the method according to the invention and only requires the removal of the catalyst containing noble metal and optionally the salts formed, for example by filtration, and the Removal of water of reaction which may be heterogeneous. Becomes the catalyst containing precious metal is applied in the form of a fixed bed, so there is also no need to separate it from the respective reaction mixture.
- a large number of different nitrobenzene compounds of the formula (A) can be used Nitrobenzenes.
- the different isomeric nitroalkylbenzenes in particular nitrotoluenes, nitroethylbenzenes, nitroxylenes and Nitrotrimethylbenzenes, the various isomeric nitrohalobenzenes, Nitrodihalobenzenes, nitrotrihalobenzenes and nitrotetrahalobenzenes, the various isomeric nitroanisoles, nitrophenetols, nitrodimethoxybenzenes and nitrotrimethoxybenzenes, the various isomeric nitrocyanbenzenes and Nitrotrifluoromethylbenzenes, the various isomeric nitrobenzoic acids, Nitrophthalic acids, nitroisophthalic acids and nitroterephthalic acids and their Alkyl esters and optionally alkyl-substituted amides, and the various isomeric, optionally
- Nitrobenzenes of the formula (A) are generally suitable, in which X 1 independently of one another represents H, fluorine, chlorine or a trifluoromethyl group and X 2 independently of one another represents H, fluorine, chlorine, a trifluoromethyl group or an optionally substituted aminocarbonyl group.
- the nitrobenzene of the formula (A) is used in the presence of a noble metal containing catalyst and a solvent with hydrogen and optionally a carbonyl compound of the formula (B) at 0.1 to 5, in particular 0.2 to 3 MPa. It is also possible to implement the performing higher pressures, however, is usually done for reasons an easier technical procedure within the above mentioned pressure ranges work.
- Aliphatic are suitable as the carbonyl compound of the formula (B) Carbonyl compounds, especially acetaldehyde, propionaldehyde, acetone, Methyl ethyl ketone, methoxyacetaldehyde and / or acetoxyacetaldehyde, preferably acetaldehyde and / or acetone.
- nitrobenzene of the formula (A) and the carbonyl compound are used Formula (B) in a molar ratio of 1: (1.0 to 3.5), in particular 1: (1.1 to 2.5), preferably 1: (1.05 to 1.5).
- the catalyst containing 1 to 10, preferably 2 to 5% by weight of noble metal corresponds to an amount of 0.01 to 0.3, in particular 0.025 to 0.15 part by weight of noble metal, based on 100 parts of nitrobenzene of the formula (A), to use.
- reaction of the nitrobenzene of the formula (A) which proceeds in accordance with the reaction equation (1) can be carried out particularly easily with the aid of a supported catalyst which contains noble metal and which can be used either in suspended form or as a fixed bed catalyst.
- Suitable carrier materials are Al 2 O 3 , pumice, alumina, silica, diatomaceous earth, silica gel, SiO 2 and / or activated carbon, preferably activated carbon.
- the supported catalyst containing the noble metal usually has 1 to 10, in particular 2 to 5 wt .-% precious metal, based on the total Catalyst, on.
- a catalyst containing precious metal is recommended Palladium or platinum-containing catalyst, especially a palladium or containing platinum, optionally in sulfited or sulfided form Supported catalyst, preferably a palladium or platinum, optionally in sulfited or sulfided form, containing activated carbon catalyst use.
- the choice of the catalyst containing noble metal is based on To a certain extent also according to the type of nitrobenzene of the formula (A).
- halogen-free nitrobenzenes are suitable for palladium or platinum, in particular palladium-containing catalysts, preferably corresponding ones Supported catalysts, particularly preferably corresponding catalysts Activated carbon.
- a halogen-containing nitrobenzene of the formula (A) is used, So, in order to safely avoid halogen splitting, special ones are used modified types of catalysts, for example a sulfited or sulfided Platinum or palladium catalyst, especially a sulfited Platinum catalyst, preferably a sulfited platinum-activated carbon catalyst.
- Aromatic compounds are suitable solvents Toluene, the various isomeric xylenes and their mixtures, Halogenobenzenes, the various isomeric halogenotoluenes and Dihalobenzenes and their mixtures, the various isomers Methoxytoluenes and trimethylbenzenes and mixtures thereof. Further can in the hydrogenation stages alcohols, such as methanol, ethanol, the isomers Use propanols and butanols and their acetates as solvents.
- toluene the various, are suitable as solvents in all stages isomeric xylenes and their mixtures, the various isomers Halogen toluenes or methoxytoluenes and mixtures thereof.
- the method according to the invention is designed when the connection (Toluene derivative) of the formula (H), which is in accordance with the reaction equation (5) forms, used as a solvent.
- the nitrobenzene of the formula (A) is set in accordance with the reaction equation (1) usually at 20 to 100, especially at 60 to 90 ° C.
- the reaction produces the compound of formula (C).
- only the Catalyst and the optionally heterogeneously present water of reaction sets the reaction mixture containing the compound of formula (C) immediately without isolating the compound of formula (C), according to the Reaction equation (2) with chloroacetyl chloride.
- the compound of formula (C) is set at 0 to 150, in particular 20 to 100 ° C with chloroacetyl chloride.
- hydrogen chloride is formed, which from the Reaction mixture must be separated. You can do this by overcooking and / or by adding a base, for example by adding a Alkali hydroxide or alkali carbonate. It has proven particularly useful separate the hydrogen chloride formed by boiling.
- the benzyl alcohol used is a compound of the formula (E) in which R 3 is H, a halogen, an alkyl or alkoxy radical each having 1 to 4 carbon atoms, in particular H, chlorine, a methyl group or methoxy group.
- the compound of formula (D) and the benzyl alcohol are used of formula (E) in a molar ratio of 1: (1 to 1.5).
- the reaction of the compound of formula (D) is usually carried out at 20 to 200 ° C. In a number of cases, this reaction at 20 to 150 ° C is sufficient perform.
- the reaction of the compound of formula (D) is carried out in Presence of a base by.
- the O-benzylglycoloylanilide of the formula (F) can be obtained by reacting the compound of the formula (C) with an O-benzylglycoloyl chloride of the formula (K), in which R 3 has the meaning given above and in particular for H, chlorine, a methyl group or Methoxy group is, according to the reaction equation (4), optionally with the addition of a base.
- R 3 has the meaning given above and in particular for H, chlorine, a methyl group or Methoxy group is, according to the reaction equation (4), optionally with the addition of a base.
- the compound (C) in isolated form or the reaction mixture containing the compound of the formula (C) can be reacted directly, without isolating the compound of the formula (C), with the O-benzylglycoloyl chloride of the formula (K).
- the catalyst containing noble metal and the water of reaction which may be heterogeneous are separated off beforehand.
- the O-benzylglycoloyl chloride used in this process variant Formula (K) can be carried out by known methods, for example by reaction of chloroacetic acid with an alkali salt of a benzyl alcohol and subsequent chlorination of O-benzylglycolic acid using phosphorus pentachloride (Helv. Chim. Acta 1933, 16, 1130 to 1132) or by implementing Sodium chloroacetate with a benzyl alcohol and subsequent chlorination of the O-benzylglycolic acid with thionyl chloride, phosgene or phosphorus oxychloride synthesize.
- the compound of formula (C) is used with the Benzylglycoloyl chloride of formula (K) at 20 to 150 ° C around. In a variety of In some cases, it has proven useful to carry out this reaction at 50 to 130 ° C.
- Formula (K) forms hydrogen chloride, which is to be separated from the reaction mixture.
- the hydrogen chloride can be separated off by boiling out and / or by adding a base.
- 1 to 10 you use 1 to 10, in particular 2 to 5 wt .-% noble metal-containing catalyst in one Amount of 0.025 to 0.5, in particular 0.05 to 0.3 parts by weight of noble metal, based on 100 parts of O-benzylglycoloylanilide of the formula (F).
- O-benzylglycoloylanilide of the formula (F) The choice of catalyst also depends to a certain extent on that to be reacted from O-benzylglycoloylanilide of the formula (F).
- O-benzylglycoloylanilides provide palladium or platinum containing Supported catalysts, in particular palladium or platinum-containing activated carbon catalysts, preferably activated carbon catalysts containing palladium are good Results.
- halogen-containing O-benzylglycoloylanilides of the formula are intended (F) implement, it is advisable to use specially modified catalysts, such as sulfited or sulfided palladium or platinum supported catalysts, in particular sulfited platinum supported catalysts, preferably sulfited platinum activated carbon catalysts to use.
- the reaction is left at 0.1 to 5, in particular 0.2 to 3 MPa.
- the O-benzylglycoloylanilide is usually used of the formula (F) and hydrogen at 20 to 100 ° C. In In a large number of cases, this implementation has proven to be sufficient at 30 to 80 ° C.
- the catalysts containing noble metal usually have 1 to 10, in particular 2 to 5% by weight of noble metal, based on the total catalyst, on.
- reaction equations (2), (3) and (4) Acylation and benzylation reactions come for the first Solvent called reaction equation into consideration, but with the Restriction that alcohols cannot be used because they are used with Acid chlorides (chloroacetyl chloride, O-benzylglycoloyl chlorides of the formula (K)) and the chloroacetanilides of formula (D) can react and thereby to Formation of unwanted by-products.
- Acid chlorides chloroacetyl chloride, O-benzylglycoloyl chlorides of the formula (K)
- chloroacetanilides of formula (D) can react and thereby to Formation of unwanted by-products.
- the present invention further relates to new O-benzylglycoloylanilides of the formula (F) wherein R 1 and R 2 for H, an alkyl, hydroxyalkyl, alkoxyalkyl or acyloxyalkyl radical each having 1 to 4 carbon atoms in the alkyl radical, R 3 for H, a halogen, an alkyl or alkoxy radical each having 1 to 4 carbon atoms in the Alkyl radical, X 1 independently of one another for H, a halogen, a cyan, trifluoromethyl, alkyl or alkoxy radical each having 1 to 4 carbon atoms in the alkyl radical, X 2 independently of one another for H, a halogen, a cyan, carboxyl, Trifluoromethyl, an optionally substituted aminocarbonyl or aminosulfonyl, an alkyl, alkoxy or alkoxycarbonyl radical each having 1 to 4 carbon atoms in the alkyl radical and n representing 0 or 1, at
- the present invention further relates to a process for the preparation of the new O-benzylglycoloylanilides of the aforementioned formula (F). It is characterized in that a nitrobenzene of the formula (A) with hydrogen and optionally a carbonyl compound of the formula (B) in the presence of a catalyst containing noble metal and a solvent in accordance with the reaction equation (1) reacted, the catalyst separated, the compound of formula (C) with chloroacetyl chloride according to the reaction equation (2) converts to a compound of formula (D), separates the hydrogen chloride formed, the compound of formula (D) with a benzyl alcohol of formula (E), and a base according to reaction equation (3) reacted, optionally separating the salt formed from the base and hydrogen chloride, or the compound of the formula (C) with an O-benzylglycoloyl chloride of the formula (K), in which R 3 has the meaning given above, and optionally with a base in accordance with the reaction equation ( 4) implemented and, if
- the method of manufacture according to the invention can be used the new O-benzylglycoloylanilides of formula (F) using a perform only solvent in the sense of a one-pot process, wherein all reaction stages without isolation and cleaning of the respective Intermediate products are run through.
- This process variant represents a particularly advantageous and technically easy to implement embodiment of the process and only requires the separation of the precious metal containing catalyst and optionally the salts formed, for example by filtration, and the removal of if necessary heterogeneous water of reaction. Will the precious metal containing If a catalyst is used in the form of a fixed bed, this is also omitted Separation from the respective reaction mixture.
- the O-benzylglycoloylanilide of the formula (F) can be isolated to be processed further. However, it is also possible to do this - as before already mentioned - to do without and containing the O-benzylglycoloylanilide Reaction mixture immediately, without the O-benzylglycoloylanilide of the formula (F) to isolate according to the reaction equation (5) into the corresponding To convert glycoloylanilide of formula (G).
- the solution can be worked up by distillation and the product isolated become. Yield 97-98%; Purity according to GC .: ⁇ 99.2%; Boiling point: 91 up to 92 ° C / 10 Torr.
- Example 1a 333 parts (3 Mol) submitted 4-fluoroaniline and at 80 to 85 ° C and 1.0 to 2.0 MPa Reduced hydrogen pressure.
- Example 1 920 parts of 4-fluoro-N-isopropylaniline solution ( ⁇ 3 mol of 4-fluoro-N-isopropylaniline) Example 1 becomes at 10 to 20 ° C within 2 hours 357.5 parts (3.2 mol) of chloroacetyl chloride were added dropwise. It'll be an hour Stirred 20 ° C and then by heating to about 90 ° C Most of the hydrogen chloride formed outgassed.
- a pH of 7 is then set at room temperature with sodium hydroxide solution adjusted, filtered off from precipitated sodium chloride and the water phase severed.
- reaction product can be isolated by simple vacuum distillation become. Yield: 94%; Purity according to GC: 98.5%; Boiling point: 113-114 ° C / 1 up to 2 torr.
- reaction mixture is cooled to 20 to 50 ° C. with Hydrochloric acid neutralized (pH 6 to 7), separated from the salt and the salt three times washed with 60 parts of toluene each. Wash toluene and filtrate are combined. Water, solvent and excess benzyl alcohol are distilled off and the bottom product then for the preparation of 4-fluoro-N-isopropyl-N-hydroxyacetyl-aniline processed further.
- the benzyloxy derivative can be isolated by vacuum distillation. Yield, based on 4-fluoro-nitrobenzene 86% of theory; Freezing point: 87.8 ° C; Boiling point: 200 ° C / 2 to 3 torr; Purity after GC: ⁇ 97%.
- DE-OS 29 04 490 describes the implementation of chloroacetanilides with anhydrous sodium acetate to acetoxyacetanilides and their saponification Glycoloylanilides.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Description
Einsatzverhältnis Edukt zu Natriumacetat 1:1 | ||
Reaktionszeit in Stunden | % Edukt | % Produkt |
8 | 93 | 4,5 |
16 | 87,5 | 9,5 |
24 | 84 | 14 |
40 | 71 | 28 |
75 | 42 | 57,5 |
105 | 24 | 75 |
150 | 11,5 | 87,5 |
175 | 1,7 | 98,0 |
180 | 0,5 | 98,9 |
Einsatzverhältnis Edukt zu Natriumacetat 1:3 | ||
Reaktionszeit in Stunden | % Edukt | % Produkt |
5,5 | 92,2 | 7,0 |
11 | 84,5 | 14,8 |
20 | 75 | 24,4 |
35 | 54 | 45,5 |
50 | 32,8 | 66,5 |
75 | 8,3 | 91,2 |
95 | 0,4 | 98,9 |
2,15 g (67 % d.Th.) O-Benzylglykolsäure-3,5-dimethylanilid als orangefarbenes Öl mit einem Reingehalt von 94,3 % (GC) an. nD 21 = 1,5768.
Claims (32)
- Verfahren zur Herstellung von Glykoloylaniliden der allgemeinen Formel (G) worin X1 unabhängig für H, ein Halogen, einen Cyan-, Trifluormethyl-, Alkyl- oder Alkoxy-Rest mit jeweils 1 bis 4 Kohlenstoffatomen im Alkylrest und X2 unabhängig voneinander für H, ein Halogen, einen Cyan-, Carboxyl-, Trifluormethyl-, einen gegebenenfalls substituierten Aminocarbonyl- oder Aminosulfonyl-, einen Alkyl-, Alkoxy- oder Alkoxycarbonyl-Rest mit jeweils 1 bis 4 Kohlenstoffatomen im Alkylrest, n für 0 oder 1 steht, und R1 und R2 für H, einen Alkyl-, Hydroxyalkyl-, Alkoxyalkyl- oder Acyloxyalkyl-Rest mit jeweils 1 bis 4 Kohlenstoffatomen im Alkylrest stehen, dadurch gekennzeichnet, daß man ein Nitrobenzol der allgemeinen Formel (A) mit Wasserstoff und gegebenenfalls einer Carbonylverbindung der Formel (B) in Gegenwart eines Edelmetall enthaltenden Katalysators und eines Lösungsmittels entsprechend der Reaktionsgleichung (1) umsetzt, den Katalysator abtrennt und die Verbindung der Formel (C) mit Chloracetylchlorid entsprechend der Reaktionsgleichung (2) zu einer Verbindung der Formel (D) umsetzt, den gebildeten Chlorwasserstoff abtrennt, die Verbindung der Formel (D) mit einem Benzylalkohol der Formel (E), worin R3 für H, ein Halogen, einen Alkyl- oder Alkoxy-Rest mit jeweils 1 bis 4 Kohlenstoffatomen steht, und einer Base entsprechend der Reaktionsgleichung (3) umsetzt, gegebenenfalls das aus der Base und Chlorwasserstoff gebildete Salz abtrennt, oder die Verbindung der Formel (C) mit einem O-Benzylglykoloylchlorid der Formel (K), worin R3 die vorstehend genannte Bedeutung besitzt, und gegebenenfalls mit einer Base entsprechend der Reaktionsgleichung (4) umsetzt, gegebenenfalls das aus Base und Chlorwasserstoff gebildete Salz abtrennt und das O-Benzylglykoloylanilid der Formel (F) in Gegenwart eines Edelmetall enthaltenden Katalysators mit Wasserstoff entsprechend der Reaktionsgleichung (5) umsetzt, die gebildete Verbindung der Formel (H) abtrennt und das Glykoloylanilid der Formel (G) isoliert.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man ein Nitrobenzol der Formel (A), worin X1 unabhängig voneinander für H, Fluor, Chlor oder eine Trifluormethylgruppe und X2 unabhängig voneinander für H, Fluor, Chlor, eine Trifluormethyl- oder eine gegebenenfalls substituierte Aminocarbonylgruppe steht, einsetzt.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß man das Nitrobenzol der Formel (A) mit Wasserstoff bei 0,1 bis 5, insbesondere 0,2 bis 3 MPa umsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß man das Nitrobenzol der Formel (A) und die Carbonylverbindung der Formel (B) im Mol-Verhältnis 1:(1,0 bis 3,5), insbesondere 1:(1,1 bis 2,5), bevorzugt 1:(1,05 bis 1,5) einsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß man den 1 bis 10, insbesondere 2 bis 5 Gew.-% Edelmetall enthaltenden Katalysator in einer Menge von 0,01 bis 0,3, insbesondere 0,025 bis 0,15 Gew.-Teilen Edelmetall, bezogen auf 100 Teile Nitrobenzol der Formel (A), einsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß man als Edelmetall enthaltenden Katalysator einen Palladium oder Platin, gegebenenfalls in sulfitierter oder sulfidierter Form, enthaltenden Trägerkatalysator, insbesondere einen Palladium- oder Platin, gegebenenfalls in sulfitierter oder sulfidierter Form, enthaltenden Aktivkohle-Katalysator einsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß man als Lösungsmittel Toluol, die verschiedenen isomeren Xylole, deren Gemische, die verschiedenen isomeren Halogentoluole, deren Gemische oder die Verbindung der Formel (H) einsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß man das Nitrobenzol bei 20 bis 100, insbesondere 60 bis 90 °C umsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß man das die Verbindung der Formel (C) enthaltende Reaktionsgemisch unmittelbar, ohne die Verbindung der Formel (C) zu isolieren, mit Chloracetylchlorid umsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß man die Verbindung der Formel (C) bei 0 bis 150, insbesondere 20 bis 100 °C mit Chloracetylchlorid umsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß man die Verbindung der Formel (C) und Chloracetylchlorid im Mol-Verhältnis 1: (1,0 bis 1,5), insbesondere 1:(1,05 bis 1,15) umsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß man den gebildeten Chlorwasserstoff durch Verkochen und/oder durch Zusatz einer Base, abtrennt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß man den gebildeten Chlorwasserstoff durch Verkochen abtrennt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 13, dadurch gekennzeichnet, daß man das die Verbindung der Formel (D) enthaltende Reaktionsgemisch unmittelbar, ohne die Verbindung der Formel (D) zu isolieren, mit dem Benzylalkohol der Formel (E) umsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 14, dadurch gekennzeichnet, daß man als Benzylalkohol eine Verbindung der Formel (E), worin R3 für H, Chlor, eine Methyl- oder Methoxygruppe steht, einsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 15, dadurch gekennzeichnet, daß man die Verbindung der Formel (D) und den Benzylalkohol der Formel (E) im Mol-Verhältnis 1:(1 bis 1,5), insbesondere 1:(1,02 bis 1,2) einsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 16, dadurch gekennzeichnet, daß man die Verbindung der Formel (D) bei 20 bis 200, insbesondere 20 bis 150 °C umsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 17, dadurch gekennzeichnet, daß man die Verbindung der Formel (D) und die Base im Molverhältnis 1:(1,0 bis 1,5), insbesondere 1:(1,02 bis 1,2) mit dem Benzylalkohol der Formel (E) umsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 18, dadurch gekennzeichnet, daß man ein Alkalihydroxid oder ein Alkalicarbonat als Base einsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß man das die Verbindung (C) enthaltende Reaktionsgemisch umittelbar, ohne die Verbindung der Formel (C) zu isolieren, mit einem O-Benzylglykoloylchlorid der Formel (K) umsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 8 und 20, dadurch gekennzeichnet, daß man ein O-Benzylglykoloylchlorid der Formel (K), worin für R3 H, Chlor, eine Methyl- oder eine Methoxygruppe steht, einsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 8 und 20 bis 21, dadurch gekennzeichnet, daß man die Verbindung der Formel (C) und das O-Benzylglykoloylchlorid der Formel (K) im Molverhältnis 1:(1 bis 1,15), insbesondere 1:(1,05 bis 1,15) umsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 8 und 20 bis 22, dadurch gekennzeichnet, daß man die Verbindung der Formel (C) mit dem O-Benzylglykoloylchlorid der Formel (K) bei 20 bis 150, insbesondere 50 bis 130 °C umsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 8 und 20 bis 23, dadurch gekennzeichnet, daß man den bei Umsetzung der Verbindung der Formel (C) mit dem O-Benzylglykoloylchlorid der Formel (K) gebildeten Chlorwasserstoff durch Auskochen und/oder durch Zusatz einer Base abtrennt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 8 und 20 bis 24, dadurch gekennzeichnet, daß man die Verbindung der Formel (C) mit dem O-Benzylglykoloylchlorid der Formel (K) unter Zusatz von einem Alkalihydroxid und/oder Alkalicarbonat als Base umsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 25, dadurch gekennzeichnet, daß man das das O-Benzylglykoloylanilid der Formel (F) enthaltende Reaktionsgemisch unmittelbar, ohne das O-Benzylglykoloylanilid der Formel (F) zu isolieren, mit Wasserstoff umsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 26, dadurch gekennzeichnet, daß man 1 bis 10, insbesondere 2 bis 5 Gew.-% Edelmetall enthaltenden Katalysator, in einer Menge von 0,025 bis 0,5, insbesondere 0,05 bis 0,3 Gew.-Teilen Edelmetall, bezogen auf 100 Teile O-Benzylglykoloylanilid der Formel (F), einsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 27, dadurch gekennzeichnet, daß man das O-Benzylglykoloylanilid der Formel (F) in Gegenwart eines Palladium oder Platin, gegebenenfalls in sulfitierter Form, enthaltenden Trägerkatalysators als Edelmetall enthaltenden Katalysator mit Wasserstoff umsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 28, dadurch gekennzeichnet, daß man das O-Benzylglykoloylanilid der Formel (F) bei 0,1 bis 5, insbesondere 0,2 bis 3 MPa umsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 29, dadurch gekennzeichnet, daß man das O-Benzylglykoloylanilid der Formel (F) bei 20 bis 100, insbesondere 30 bis 80 °C umsetzt.
- O-Benzylglykoloylanilide der allgemeinen Formel (F) worin R1 und R2 für H, einen Alkyl-, Hydroxyalkyl-, Alkoxyalkyl oder Acyloxyalkylrest mit jeweils 1 bis 4 Kohlenstoffatomen im Alkylrest, R3 für H, ein Halogen, einen Alkyl- oder Alkoxy-Rest mit jeweils 1 bis 4 Kohlenstoffatomen im Alkylrest, X1 unabhängig voneinander für H, ein Halogen, einen Cyan-, Trifluormethyl-, Alkyl oder Alkoxy-Rest mit jeweils 1 bis 4 Kohlenstoffatomen im Alkylrest, X2 unabhängig voneinander für H, ein Halogen, einen Cyan-, Carboxyl-, Trifluormethyl-, einen gegebenenfalls substituierten Aminocarbonyl- oder Aminosulfonyl-, einen Alkyl-, Alkoxy- oder Alkoxycarbonyl-Rest mit jeweils 1 bis 4 Kohlenstoffatomen im Alkylrest und n für 0 oder 1 steht, wobei wenigstens einer der Reste X2 verschieden von H ist, falls jeder der Reste X1 eine CH3 Gruppe darstellt, oder R3 verschieden von H ist, falls n = 0 und jeder der Reste X1 und X2 für F steht.
- Verfahren zur Herstellung der O-Benzylglykoloylanilide der Formel (F), wie in Anspruch 31 angegeben, dadurch gekennzeichnet, daß man ein Nitrobenzol der Formel (A) mit Wasserstoff und gegebenenfalls einer Carbonylverbindung der Formel (B) in Gegenwart eines Edelmetall enthaltenden Katalysators und eines Lösungsmittels entsprechend der Reaktionsgleichung (1) umsetzt, den Katalysator abtrennt, die Verbindung der Formel (C) mit Chloracetylchlorid entsprechend der Reaktionsgleichung (2) zu einer Verbindung der Formel (D) umsetzt, den gebildeten Chlorwasserstoff abtrennt, die Verbindung der Formel (D) mit einem Benzylalkohol der Formel (E), und einer Base entsprechend der Reaktionsgleichung (3) umsetzt, gegebenenfalls das aus der Base und Chlorwasserstoff gebildete Salz abtrennt, oder die Verbindung der Formel (C) mit einem O-Benzylglykoloylchlorid der Formel (K), worin R3 die in Anspruch 31 genannte Bedeutung besitzt, und gegebenenfalls mit einer Base entsprechend der Reaktionsgleichung (4) umsetzt und gegebenenfalls das aus Base und Chlorwasserstoff gebildete Salz abtrennt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4413618A DE4413618A1 (de) | 1994-04-19 | 1994-04-19 | Verfahren zur Herstellung von Glykoloylaniliden |
DE4413618 | 1994-04-19 |
Publications (2)
Publication Number | Publication Date |
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EP0678502A1 EP0678502A1 (de) | 1995-10-25 |
EP0678502B1 true EP0678502B1 (de) | 1999-03-31 |
Family
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Application Number | Title | Priority Date | Filing Date |
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EP95105178A Expired - Lifetime EP0678502B1 (de) | 1994-04-19 | 1995-04-06 | Verfahren zur Herstellung von Glykoloylaniliden |
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Country | Link |
---|---|
US (1) | US5616799A (de) |
EP (1) | EP0678502B1 (de) |
JP (1) | JPH0848661A (de) |
CA (1) | CA2147382A1 (de) |
DE (2) | DE4413618A1 (de) |
Families Citing this family (11)
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DE19525098A1 (de) * | 1995-07-10 | 1997-01-16 | Hoechst Ag | Verfahren zur Herstellung von Hydroxycarbonsäureaniliden |
US7964695B2 (en) | 2005-03-28 | 2011-06-21 | Albemarle Corporation | Chain extenders |
US8076518B2 (en) | 2005-03-28 | 2011-12-13 | Albemarle Corporation | Chain extenders |
CN101160283A (zh) * | 2005-03-28 | 2008-04-09 | 雅宝公司 | 二亚胺和仲二胺 |
KR20080080158A (ko) * | 2005-12-30 | 2008-09-02 | 알베마를 코포레이션 | 감소된 색을 가지는 디아민 |
CA2670041A1 (en) * | 2007-01-10 | 2008-07-17 | Albemarle Corporation | Formulations for reaction injection molding and for spray systems |
CN103553934B (zh) * | 2013-09-11 | 2016-02-17 | 泸州东方农化有限公司 | 一种n-异丙基-4-氟苯胺的制备方法 |
CN103664675B (zh) * | 2013-11-27 | 2016-05-18 | 浙江省诸暨合力化学对外贸易有限公司 | 一种2-氯-n-(4-氟苯基)-n-异丙基乙酰胺的制备方法 |
CN111072498B (zh) * | 2019-12-31 | 2022-11-15 | 浙江解氏新材料股份有限公司 | 一种化工中间体n-异丙基对氟苯胺的制备方法 |
CN113045444A (zh) * | 2021-04-06 | 2021-06-29 | 宁夏常晟药业有限公司 | 一种n-(4-氟苯胺)-2-羟基-n-异丙基乙酰胺的合成方法 |
CN116041200B (zh) * | 2022-12-21 | 2024-05-28 | 大连奇凯医药科技有限公司 | 一种合成n-(4-氟苯胺)-2-羟基-n-异丙基乙酰胺的方法 |
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DE2904490A1 (de) * | 1979-02-07 | 1980-08-21 | Bayer Ag | Verfahren zur herstellung von alpha -hydroxycarbonsaeureamiden |
DE3244956A1 (de) * | 1982-12-04 | 1984-06-07 | Bayer Ag, 5090 Leverkusen | Verfahren zur herstellung von glycolsaeureamiden |
DE3539394A1 (de) * | 1985-11-07 | 1987-05-14 | Bayer Ag | Verfahren zur herstellung von glykolsaeureamiden |
DE3884703D1 (de) * | 1987-07-23 | 1993-11-11 | Bayer Ag | Halogenierte Thiadiazolyl-oxyessig-säureamide, Verfahren und Zwischenprodukte zu ihrer Herstellung und ihre Verwendung als Herbizide. |
DE4003078A1 (de) * | 1990-02-02 | 1991-08-08 | Bayer Ag | Verfahren zur herstellung von n-alkyl-arylaminen |
US5177261A (en) * | 1991-07-22 | 1993-01-05 | Mallinckrodt Medical, Inc. | Synthesis of ioversol using chloroacetyl chloride |
-
1994
- 1994-04-19 DE DE4413618A patent/DE4413618A1/de not_active Withdrawn
-
1995
- 1995-04-06 EP EP95105178A patent/EP0678502B1/de not_active Expired - Lifetime
- 1995-04-06 DE DE59505473T patent/DE59505473D1/de not_active Expired - Fee Related
- 1995-04-17 US US08/423,522 patent/US5616799A/en not_active Expired - Fee Related
- 1995-04-18 CA CA002147382A patent/CA2147382A1/en not_active Abandoned
- 1995-04-18 JP JP7092795A patent/JPH0848661A/ja not_active Withdrawn
Also Published As
Publication number | Publication date |
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DE59505473D1 (de) | 1999-05-06 |
DE4413618A1 (de) | 1995-10-26 |
EP0678502A1 (de) | 1995-10-25 |
CA2147382A1 (en) | 1995-10-20 |
US5616799A (en) | 1997-04-01 |
JPH0848661A (ja) | 1996-02-20 |
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